| Inns | HS |
| 218-8 | 39 | Old Brightonians v Old Cliftonians | Clifton College Close Ground, Clifton | 1975 |
| 210 | 49 | Old Brightonians v Repton Pilgrims | Repton School Ground, Repton | 2006 |
| 203 | 43 | Old Brightonians v Radley Rangers | Brighton College Ground, Brighton | 2002 |
| 182-9 | 32* | Old Brightonians v Old Cliftonians | Clifton College Close Ground, Clifton | 1996 |
| 180-9 | 42 | Old Brightonians v Old Tonbridgians | Tonbridge School Ground, Tonbridge | 1969 |
| 178 | 47 | Old Brightonians v Harrow Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 2015 |
| 175 | 40 | Old Brightonians v Repton Pilgrims | Brighton College Ground, Brighton | 1996 |
| 172-9 | 36 | Old Brightonians v Uppingham Rovers | Brighton College Ground, Brighton | 1978 |
| 167 | 36 | Old Brightonians v Old Tonbridgians | Tonbridge School Ground, Tonbridge | 1975 |
| 166 | 30 | Old Brightonians v Oundle Rovers | Oundle School Ground, Oundle | 2019 |
| 162 | 44 | Old Brightonians v Harrow Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 2003 |
| 157 | 39* | Old Brightonians v Oundle Rovers | Oundle School Ground, Oundle | 1989 |
| 151 | 40 | Old Brightonians v Repton Pilgrims | Repton School Ground, Repton | 2023 |
| 147-9 | 48 | Old Brightonians v Radley Rangers | Brighton College Ground, Brighton | 1983 |
| 145 | 33 | Old Brightonians v Old Tonbridgians | Brighton College Ground, Brighton | 2010 |
| 141-4 | 35 | Old Brightonians v Downside Wanderers | Brighton College Ground, Brighton | 1979 |
| 136 | unknown | Old Brightonians v Old Blundellians | Brighton College Ground, Brighton | 1980 |
| 133 | 41 | Old Brightonians v Charterhouse Friars | Brighton College Ground, Brighton | 2016 |
| 132 | 32 | Old Brightonians v Old Merchant Taylors | Durrants Sports Ground, Croxley Green | 1982 |
| 132 | 41 | Old Brightonians v Uppingham Rovers | Brighton College Ground, Brighton | 2009 |
| 131 | 32* | Old Brightonians v Old Tonbridgians | Brighton College Ground, Brighton | 2012 |
| 129-5 | 41* | Old Brightonians v Old Alleynians | Spen Cama Memorial Ground, Fulking | 2021 |
| 127 | 27 | Old Brightonians v Old Wykehamists | Brighton College Ground, Brighton | 2017 |
| 126 | 39* | Old Brightonians v Old Alleynians | Dulwich College Ground, Dulwich | 2008 |
| 123 | 33 | Old Brightonians v Old Amplefordians | Brighton College Ground, Brighton | 1970 |
| 122-5 | 49* | Old Brightonians v Old Amplefordians | Brighton College Ground, Brighton | 1972 |
| 122 | 36* | Old Brightonians v Shrewsbury Saracens | Brighton College Ground, Brighton | 2002 |
| 120 | 32* | Old Brightonians v Charterhouse Friars | Brighton College Ground, Brighton | 1973 |
| 118 | 27 | Old Brightonians v Charterhouse Friars | Charterhouse School, Godalming | 1981 |
| 118 | 38 | Old Brightonians v Oundle Rovers | Oundle School Ground, Oundle | 1988 |
